Access: from La Mure, follow 10 km towards Valbonnais, the Col d'Ornon. Shortly before Valbonnais, on the D526, pass the old station and park near the Pont du Prêtre.
Approach walk: Cross the road (watch out for cars), follow the road and then join the path that goes up a steep bank before winding its way between the remains of the arches in the cement works. After 5 minutes you will get to the cliff, which can only be seen when you arrive just below it.